如何在 C++ 中更改文本文件的名称
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How to change a text file's name in C++
提问by Jail
I'd like to change a txtfile's name but I can't find how to do this.
我想更改txt文件名，但找不到如何执行此操作。
For example, I want to rename foo.txtto boo.txtin my C++ program.
例如，我想在我的 C++ 程序中重命名foo.txt为boo.txt。
回答by Jerry Coffin
#include <stdio.h>(or <cstdio>) and use rename(or std::rename):
#include <stdio.h>（或<cstdio>）并使用rename（或std::rename）：
rename("oldname.txt", "newname.txt");
Contrary to popular belief, this is included in the standard library, and is portable up to a point -- though of course the allowable contents of the strings will vary with the target system.
与流行的看法相反，这包含在标准库中，并且在一定程度上是可移植的——当然，字符串的允许内容会因目标系统而异。
回答by Tamás Szelei
Filesystem support is notably absent from the C++ standard library. As Jerry Coffin's answer shows, there actually is a rename function in stdio (contrary to the popular belief which I shared). There are however many filesystem-related appliances that the standard lib does not cover, hence the existence of Boost::Filesystem (notably manipulating directories and retrieving information about files).
文件系统支持是 在 C++ 标准库中明显不存在. 正如 Jerry Coffin 的回答所示，stdio 中实际上有一个重命名函数（与我分享的流行观点相反）。然而，标准库没有涵盖许多与文件系统相关的设备，因此存在 Boost::Filesystem（特别是操作目录和检索有关文件的信息）。
This is a design decision to make C++ less constrained (i.e. make it possible to compile on a wide range of platforms including embedded systems where the idea of a file is non-existent).
这是使 C++ 不受约束的设计决策（即，可以在各种平台上进行编译，包括不存在文件概念的嵌入式系统）。
To perform file operations, one has two options:
要执行文件操作，有两个选项：
Use the API of the target OS
Use a library that provides a unified interface across platforms
使用目标操作系统的 API
使用提供跨平台统一接口的库
Boost::Filesystemis such C++ library that abstracts away platform differences.
Boost::Filesystem就是这样一个抽象出平台差异的 C++ 库。
You can use the Boost::Filesystem::renameto rename a file.
您可以使用Boost::Filesystem::rename重命名文件。
